Publications @ CHI 2020

@inproceedings{WambsganssConversational,

title = {A Conversational Agent to Improve Response Quality in Course Evaluations},

author = {Thiemo Wambsganss (University of St.Gallen) and Rainer Winkler (University of St.Gallen) and Matthias Söllner (University of Kassel / University of St.Gallen) and Jan Marco Leimeister (University of St.Gallen / University of Kassel)},

doi = {10.1145/3334480.3382805},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{ZennerVirtual,

title = {A Virtual Reality Couch Configurator Leveraging Passive Haptic Feedback},

author = {André Zenner (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Felix Kosmalla (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Jan Ehrlich(German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Philip Hell (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Gerrit Kahl (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Christian Murlowski (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Marco Speicher (Deutsche Hochschule für Prävention und Gesundheitsmanagement (DHfPG)) and Florian Daiber (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Daniel Heinrich (FOM University of Applied Science, Essen) and Antonio Krüger (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus)},

url = {https://youtu.be/Qh5_bnfIQL8, Video},

doi = {10.1145/3334480.3382953},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {When configuring furniture during sales consultancy in a furniture store, customers are usually confronted with abstract 2D drawings or simplistic renderings of the discussed configuration on a display. We present a novel application based on virtual reality (VR) to support furniture store consultations. Our system allows customers to elaborate different configurations of a couch in dialogue with a sales expert and lets customers experience them through immersive VR in a variety of virtual environments. While the sales-expert can modify the couch layout and fabric, the customer can stay immersed and experience a realistic tactile feeling of the configured couch through passive haptic feedback provided by a sample piece the customer can sit on. A preliminary field study in a furniture store showed that the system is immersive, conveying realistic impressions of the couch configurations. Customers perceived the VR configurator as useful since it would make their purchase decisions easier.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{HollaenderAll,

title = {All Fun and Games: Obtaining Critical Pedestrian Behavior Data from an Online Simulation},

author = {Kai Holländer (LMU Munich) and Luca Schellenberg (LMU Munich) and Changkun Ou (LMU Munich) and Andreas Butz (LMU Munich)},

doi = {10.1145/3334480.3382797},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Automated cars will need to observe pedestrians and react adequately to their behavior when driving in urban areas. Judging pedestrian behavior, however, is hard. When approaching it by machine learning methods, large amounts of training data is needed, which is costly and difficult to obtain, especially for critical situations. In order to provide such data, we have developed an online game inspired by Frogger, in which players have to cross streets. Accidents and critical situations are a natural part of the data produced in such a way without anybody getting hurt in reality. We present the design of our game and an analysis of the resulting data and its match to real world behavior observed in previous work. We found that behavior patterns in real and virtual environments correlated and argue that game data could be used to train machine learning algorithms for predicting real pedestrians' walking trajectories when crossing a road. This approach could be used in future automated vehicles to increase pedestrian safety.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{MarkyAll,

title = {All in One! User Perceptions on Centralized IoT Privacy Settings},

author = {Karola Marky (TU Darmstadt) and Kai Kunze (Keio University) and Verena Zimmermann (TU Darmstadt) and Alina Stöver (TU Darmstadt) and Philipp Hoffmann (TU Darmstadt) and Max Mühlhäuser (TU Darmstadt)},

doi = {10.1145/3334480.3383016},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {IoT devices deliver their functionality by accessing data. Users decide which data they are willing to share via privacy settings interfaces that are typically on the device, or in the app controlling it. Thus, users have to interact with each device or app which is time-consuming and settings might be overlooked. In this paper, we provide a stepping stone into a multi-device interface for adjusting privacy settings. We present three levels of information detail: 1) sensor name 2), sensor name and information about captured data and 3) detailed information on each collected data type including consequences. Through a pre-study with 15 participants, we found that users prefer the access to detailed information because this offers the best decision support. They also wish for a clear status communication, a possibility for rule-based settings, and delegation options.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DegraenAmbiPlant,

title = {AmbiPlant - Ambient Feedback for Digital Media through Actuated Plants},

author = {Donald Degraen (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Marc Schubhan (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Kamila Mushkina (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Akhmajon Makhsadov (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Felix Kosmalla (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and André Zenner (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Antonio Krüger (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus)},

url = {https://www.youtube.com/watch?v=HvSRRmgbg58, Video},

doi = {10.1145/3334480.3382860},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {To enhance viewing experiences during digital media consumption, both research and industry have considered ambient feedback effects to visually and physically extend the content presented. In this paper, we present AmbiPlant, a system using support structures for plants as interfaces for providing ambient effects during digital media consumption. In our concept, the media content presented to the viewer is augmented with visual actuation of the plant structures in order to enhance the viewing experience. We report on the results of a user study comparing our AmbiPlant condition to a condition with ambient lighting and a condition without ambient effects. Our system outperformed the "no ambient effects" condition in terms of engagement, entertainment, excitement and innovation and the ambient lighting condition in terms of excitement and innovation.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{VortmannAttention,

title = {Attention-Aware Brain Computer Interface to Avoid Distractions in Augmented Reality},

author = {Lisa-Marie Vortmann (University of Bremen) and Felix Putze (University of Bremen)},

doi = {10.1145/3334480.3382889},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{SawitzkyAugmentation,

title = {Augmentation Concepts with HUDs for Cyclists to Improve Road Safety in Shared Spaces},

author = {Tamara von Sawitzky (Human-Computer Interaction Group, Technische Hochschule Ingolstadt) and Philipp Wintersberger (CARISSMA, Technische Hochschule Ingolstadt) and Andreas Löcken (Human-Computer Interaction Group, Technische Hochschule Ingolstadt) and Anna-Katharina Frison (Human-Computer Interaction Group, Technische Hochschule Ingolstadt) and Andreas Riener (Human-Computer Interaction Group, Technische Hochschule Ingolstadt)},

doi = {10.1145/3334480.3383022},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Exploiting the potential of automated vehicles and future traffic concepts like platooning or dynamic intersections requires the integration of human traffic participants. Re-cent research investigating how automated vehicles can communicate with other road users has focused mainly on pedestrians. We argue that cyclists are another important group of vulnerable road users that must be considered, as cycling is a vital transportation modality for a more sustainable future. Within this paper, we discuss the needs of cyclists and claim that their integration will demand to hink of other concepts, which support moving communication partners. We further sketch potential approaches for augmented reality applications based on related work and present results of a pilot study aiming to evaluate and improve those. Initial findings show that people are open towards concepts that increase cyclist safety. However, it is key to present information clearly and unambiguously to produce a benefit.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{RanasingheAutonomous,

title = {Autonomous Vehicle-Pedestrian Interaction Across Cultures: Towards Designing Better External Human Machine Interfaces (eHMIs)},

author = {Champika Ranasinghe (University of Twente) and Kai Holländer (LMU Munich) and Rebecca Currano (Stanford University) and David Sirkin (Stanford University) and Dylan Moore (Stanford University) and Stefan Schneegass (University of Duisburg-Essen) and Wendy Ju (Cornell Tech)},

doi = {10.1145/3334480.3382957},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Drivers and pedestrians use various culturally-based nonverbal cues such as head movements, hand gestures, and eye contact when crossing roads. With the absence of a human driver, this communication becomes challenging in autonomous vehicle (AV)- pedestrian interaction. External human-machine interfaces (eHMIs) for AV-pedestrian interaction are being developed based on the research conducted mainly in North America and Europe, where the traffic and pedestrian behavior are very structured and follow the rules. In other cultures (e.g., South Asia), this can be very unstructured (e.g., pedestrians spontaneously crossing the road at non-cross walks is not very uncommon). However, research on investigating cross-cultural differences in AV-Pedestrian interaction is scarce. This research focuses on investigating cross-cultural differences in AV-Pedestrian interaction to gain insights useful for designing better eHMIs. This paper details three cross-cultural studies designed for this purpose, and that will be deployed in two different cultural settings: Sri Lanka and Germany.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{SchmidmaierBeep,

title = {Beep Beep: Building Trust with Sound},

author = {Matthias Schmidmaier (LMU Munich) and Dominik Maurice Runge (LMU Munich) and Heinrich Hußmann (LMU Munich)},

doi = {10.1145/3334480.3382848},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Audio is one modality that besides content transmission offers non-verbal cues that influence emotional perception. This allows to increase trust for example in privacy-sensitive systems like digital assistants. In this work we focus on basic audio feedback and explore how parameters like melody, pitch or tempo influence the creation of trust. We refer to related research in trust perception of voice, and evaluate if the derived concepts can be universally applied to simple sound patterns. Our study (n=39) shows significant effects for melody and mode, while tendencies were found for pitch and individual user preferences. We consider our findings to serve as basis for research towards the design of unobtrusive and trustworthy user experiences.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DuewelCombining,

title = {Combining Embedded Computation and Image Tracking for Composing Tangible Augmented Reality},

author = {Tim Düwel (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Nico Herbig (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Denise Kahl (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Antonio Krüger (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus)},

doi = {10.1145/3334480.3383043},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {This work proposes a combination of embedded computation and marker tracking to provide more robust augmentations for composed objects in Tangible Augmented Reality. By integrating conductive elements into the tangibles’ sides, communication between embedded microprocessors is enabled, such that a connected composition can be computed without relying on any marker tracking information. Consequently, the virtual counterparts of the tangibles can be aligned, and this virtual composition can be attached to a single marker as a whole, increasing the tracking robustness towards occlusions and perspective distortions. A technical evaluation shows that this approach provides more robust augmentations if a tangible block in a composition is occluded by at least 50% or perspectively distorted by at least 40 to 50 degrees, depending on the block’s size. Additionally, a test with users relying on the use case of a couch configuration tool shows promising results regarding usability and user experience.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{ZepfEmpathicGPS,

title = {EmpathicGPS: Exploring the Role of Voice Tonality in Navigation Systems during Simulated Driving},

author = {Sebastian Zepf (Mercedes-Benz AG) and Neska El Haouij (Massachusetts Institute of Technology) and Wolfgang Minker (Ulm University) and Javier Hernandez (Massachusetts Institute of Technology) and Rosalind Picard (Massachusetts Institute of Techology)},

doi = {10.1145/3334480.3382935},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{JanböckeFinding,

title = {Finding the Inner Clock: A Chronobiology-based Calendar},

author = {Sarah Janböcke (University of Siegen) and Alina Gawlitta (University of Siegen) and Judith Dörrenbächer (University of Siegen) and Marc Hassenzahl (University of Siegen)},

doi = {10.1145/3334480.3382830},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{BharmalFrom,

title = {From Intentions to Successful Action: Supporting the Creation and Realization of Implementation Intentions},

author = {Toufique Bharmal (Uni Siegen) and Marc Hassenzahl (Uni Siegen) and Matthias Laschke (Uni Siegen)},

doi = {10.1145/3334480.3383018},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {"Good" intentions, such as to exercise more, only rarely spur action. In contrast, so-called "implementation intentions“ explicitly relate goal-directed behavior to particular situations (e.g., when, where, and how). Studies show that this has a positive effect on goal achievement. This paper explores whether technology can support the transformation of "good" intentions into concrete implementation intentions and their triggering as well as routinization. Specifically, we report three single case studies with a functional prototype. This prototype supported creating implementation intentions, putting them into a calendar, and being reminded through an object representative for the planned activity. Through the prototype, all three participants engaged more in the activities chosen to fulfill the intention. All in all, the notion of supporting individual implementation intentions through technology seems a viable strategy to support behavior change.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{RivuGaze,

title = {Gaze’N’Touch: Enhancing Text Selection on Mobile Devices Using Gaze},

author = {Radiah Rivu (University of Bundeswehr Munich) and Yasmeen Abdrabou (University of Bundeswehr Munich) and Ken Pfeuffer (University of Bundeswehr Munich) and Mariam Hassib (University of Bundeswehr Munich) and Florian Alt (University of Bundeswehr Munich)

},

doi = {10.1145/3334480.3382802},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Text selection is a frequent task we do everyday to edit, modify or delete text. Selecting a word requires not only precision but also switching between selections and typing which influences both speed and error rates. We evaluate a novel concept, extending text editing with an additional modality, that is gaze. We present a user study (N=16) where we explore how the novel concepts, referred to as GazeButton, can improve text selection and compare it to touch-based selection. We also tested the effect of text size on the selection techniques by comparing two different text sizes. Results show that gaze-based selection was faster with larger text size, although not statistically significant. Qualitative feedback show a preference for gaze over touch, motivating a new direction of gaze usage in text editors.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{LoefflerHybridity,

title = {Hybridity as Design Strategy for Service Robots to Become Domestic Products},

author = {Diana Löffler (USI) and Judith Dörrenbächer (USI) and Julika Welge (USI) and Marc Hassenzahl (USI)},

doi = {10.1145/3334480.3382832},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Service robots have yet to occupy niches in domestic environments beyond vacuuming and lawn mowing. This can only happen by providing an alternative experience rather than mimicking and competing with humans, pets and already available appliances. We argue that the robot’s hybrid nature on a spectrum between ‘thing’ and ‘being’ is a suitable framework to create such a unique experience. More specifically, we argue that hybridity creates ambiguity which affords a wider range of practices to occur, from tool use to social interaction. We evaluate this idea in an online study with 61 participants who rated three robots with rather biomorphic (Pepper), hybrid (Sympartner) or device-like (Relay) appearance. Results show that the hybrid design affords a broader spectrum of use compared to designs inscribing to treat the robot as either possession or social companion. The study offers initial insights on ambiguity-through-hybridity as design strategy to help robots become domestic products.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{PrangeWish,

title = {I Wish You Were Smart(er): Investigating Users' Desires and Needs Towards Home Appliances},

author = {Sarah Prange (University of Bundeswehr Munich / LMU Munich) and Florian Alt (University of Bundeswehr Munich)},

doi = {10.1145/3334480.3382910},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {In this work, we present findings from an online survey (N=77) in which we assessed situations of users wishing for features or devices in their home to be smart(er). Our work is motivated by the fact that on one hand, several successful smart devices and features found their way into users’ homes (e.g., smart TVs, smart assistants, smart toothbrushes). On the other hand, a more holistic understanding of when and why users would like devices and features to be smart is missing as of today. Such knowledge is valuable for researchers and practitioners to inform the design of future smart home devices and features, in particular with regards to interaction techniques, privacy mechanisms, and, ultimately, acceptance and uptake. We found that users would appreciate smart features for various use cases, including remote control and multi-tasking, and are willing to share devices. We believe our work to be useful for designers and HCI researchers by supporting the design and evaluation of future smart devices.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{LaschkeImprovising,

title = {Improvising with Machines – Designing Artistic Non-Human Actors},

author = {Matthias Laschke (Uni Siegen) and Robin Neuhaus (Uni Siegen) and Marc Hassenzahl (Uni Siegen) and Claudius Lazzeroni (Folkwang University)},

doi = {10.1145/3334480.3382825},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {For musicians, improvising with other musicians is not uncommon. But what happens when musicians engage in musical improvisation with semi-autonomous machines? We investigated a seminar in which design students built machines for musicians to improvise with. We explored the experiences of musicians when improvising with non-human musicians, as well as the challenges of designing non-human musicians. Among other things, we found that while from an outside perspective, the machines appeared as independent actors that interact with the musicians, the musicians experienced them as additional instruments they controlled. The interaction design of non-human actors was challenging for designers},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{KreimeierInitial,

title = {Initial Evaluation of Different Types of Virtual Reality Locomotion Towards a Pedestrian Simulator for Urban and Transportation Planning},

author = {Julian Kreimeier (Nuremberg Institute of Technology) and Daniela Ullmann (Nuremberg Institute of Technology) and Harald Kipke (Nuremberg Institute of Technology) and Timo Götzelmann (Nuremberg Institute of Technology)},

doi = {10.1145/3334480.3382958},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{LiebersIntroducing,

title = {Introducing Functional Biometrics: Using Body-Reflections as a Novel Class of Biometric Authentication Systems},

author = {Jonathan Liebers (Universität Duisburg-Essen) and Stefan Schneegass (Universität Duisburg-Essen)},

doi = {10.1145/3334480.3383059},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Human-computer authentication is a continuously important topic where besides security also the aspects of usability must be taken into consideration. Biometric authentication methods promise to fulfill both aspects to a high degree, yet they come with severe drawbacks, such as the lack of changeability of the utilized trait, in case it is leaked or stolen. To compensate for these disadvantages, we introduce a novel class of biometric authentication systems in this work, named Functional Biometrics. This approach regards the human body as a function that transforms a stimulus which is applied to the body by the authentication system. Both, the stimulus and the measured body reflection form a pair that can subsequently be used for authentication, yet the underlying function remains secret. Following this approach, we intend to disprove some of the drawbacks of traditional biometrics.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{RzayevIt,

title = {It's Not Always Better When We're Together: Effects of Being Accompanied in Virtual Reality},

author = {Rufat Rzayev (University of Regensburg) and Florian Habler (University of Regensburg) and Polina Ugnivenko (University of Regensburg) and Niels Henze (University of Regensburg) and Valentin Schwind (University of Regensburg)},

doi = {10.1145/3334480.3382826},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Virtual reality (VR) enables immersive applications that make rich content available independent of time and space. By replacing or supplementing physical face-to-face meetings, VR could also radically change how we socially interact with others. Despite this potential, the effect of transferring physical collaborative experience into a virtual one is unclear. Therefore, we investigated the experience differences between a collaborative virtual environment (CVE) and a physical environment. We used a museum visit as a task since it is a typical social experience and a promising use case for VR. 48 participants experienced the task in real and virtual environments, either alone or with a partner. Despite the potential of CVEs, we found that being in a virtual environment has adverse effects on the experience which is reinforced by being in the environment with another person. Based on quantitative and qualitative results, we provide recommendations for the design of future multi-user virtual environments.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{RagozinMaze,

title = {MazeRunVR: An Open Benchmark for VR Locomotion Performance, Preference and Sickness in the Wild},

author = {Kirill Ragozin (Keio University) and Karola Marky (TU Darmstadt) and Kai Kunze (Keio University) and Yun Suen Pai (University of Auckland)},

doi = {10.1145/3334480.3383035},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Locomotion in virtual reality (VR) is one of the biggest problems for large scale adoption of VR applications. Yet, to our knowledge, there are few studies conducted in-the-wild to understand performance metrics and general user preference for different mechanics. In this paper, we present the first steps towards an open framework to create a VR locomotion benchmark. As a viability study, we investigate how well the users move in VR when using three different locomotion mechanics. It was played in over 124 sessions across 10 countries in a period of three weeks. The included prototype locomotion mechanics are arm swing, walk-in-place and trackpad movement. We found that overall, users performed significantly faster using arm swing and trackpad when compared to walk-in-place. For subjective preference, arm swing was significantly more preferred over the other two methods. Finally for induced sickness, walkin-place was the overall most sickness-inducing locomotion method.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{KnierimOpportunities,

title = {Opportunities and Challenges of Text Input in Portable Virtual Reality},

author = {Pascal Knierim (LMU Munich) and Thomas Kosch (LMU Munich) and Johannes Groschopp (LMU Munich) and Albrecht Schmidt (LMU Munich)},

doi = {10.1145/3334480.3382920},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Text input in virtual reality is not widespread outside of labs, although being increasingly researched. Current setups require powerful components that are expensive or not portable, hence preventing effective in-the-wild use. Latest technological advances enable portable mixed reality experiences on smartphones. In this work, we propose a portable low-fidelity solution for text input in mixed reality on a physical keyboard that employs accessible off-the-shelf components. Through a user study with 24 participants, we show that our prototype leads to a significantly higher text input performance compared to soft keyboards. However, it falls behind on copy editing compared to soft keyboards. Qualitative inquiries revealed that participants enjoyed the ample display space and perceived the accompanied privacy as beneficial. Finally, we conclude with challenges and future research that builds upon the presented findings.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{GuentherPneumo,

title = {PneumoVolley: Pressure-based Haptic Feedback on the Head through Pneumatic Actuation},

author = {Sebastian Günther (TU Darmstadt) and Dominik Schön (TU Darmstadt) and Florian Müller (TU Darmstadt) and Max Mühlhäuser (TU Darmstadt) and Martin Schmitz (TU Darmstadt)},

url = {https://youtu.be/ZKnV8HrUx9M , Video

https://twitter.com/search?q=%23teamdarmstadt&src=typed_query&f=live, Twitter},

doi = {10.1145/3334480.3382916},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Haptic Feedback brings immersion and presence in Virtual Reality (VR) to the next level. While research proposes the usage of various tactile sensations, such as vibration or ultrasound approaches, the potential applicability of pressure feedback on the head is still underexplored. In this paper, we contribute concepts and design considerations for pressure-based feedback on the head through pneumatic actuation. As a proof-of-concept implementing our pressure-based haptics, we further present PneumoVolley: a VR experience similar to the classic Volleyball game but played with the head. In an exploratory user study with 9 participants, we evaluated our concepts and identified a significantly increased involvement compared to a no-haptics baseline along with high realism and enjoyment ratings using pressure-based feedback on the head in VR.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{BabicSimo,

title = {Simo: Interactions with Distant Displays by Smartphones with Simultaneous Face and World Tracking},

author = {Teo Babic (BMW Group) and Florian Perteneder (University of Applied Sciences Upper Austria) and Harald Reiterer (University of Konstanz) and Michael Haller (University of Applied Sciences Upper Austria)},

url = {https://www.twitter.com/HCIGroupKN, Twitter},

doi = {10.1145/3334480.3382962},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {The interaction with distant displays often demands complex, multi-modal inputs which need to be achieved with a very simple hardware solution so that users can perform rich inputs wherever they encounter a distant display. We present Simo, a novel approach, that transforms a regular smartphone into a highly-expressive user motion tracking device and controller for distant displays. Both the front and back cameras of the smartphone are used simultaneously to track the user’s hand as well as the head, and body movements in real-world space and scale. In this work, we first define the possibilities for simultaneous face- and world-tracking using current off-the-shelf smartphones. Next, we present the implementation of a smartphone app enabling hand, head, and body motion tracking. Finally, we present a technical analysis outlining the possible tracking range.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{KosmallaImportance,

title = {The Importance of Virtual Hands and Feet for Virtual Reality Climbing},

author = {Felix Kosmalla (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and André Zenner (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Corinna Tasch (Saarland Informatics Campus) and Florian Daiber (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus) and Antonio Krüger (German Research Center for Artificial Intelligence (DFKI), Saarland Informatics Campus)},

doi = {10.1145/3334480.3383067},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Virtual reality (VR) climbing systems registering physical climbing walls with immersive virtual environments (IVEs) have been a focus of past research. Such systems can provide physical user experiences similar to climbing in (extreme) outdoor environments. While in the real world, climbers can always see their hands and feet, virtual representations of limbs need to be spatially tracked and accurately rendered in VR, which increases system complexity. In this work, we investigated the importance of integrating virtual representations of the climber's hands and/or feet in VR climbing systems. We present a basic solution to track, calibrate and represent the climber's hands and feet, and report the results of a user study, comparing the importance of virtual limb representations in terms of perceived hand and feet movement accuracy, and enjoyability of the VR climbing experience. Our study suggests that the inclusion of feet is more important than having a hand visualization.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{MerinoToward,

title = {Toward Agile Situated Visualization: An Exploratory User Study},

author = {Leonel Merino (University of Stuttgart) and Boris Sotomayor-Gómez (Ernst Strüngmann Institute for Neuroscience in Cooperation with Max Planck Society) and Xingyao Yu (University of Stuttgart) and Ronie Salgado (UNiversity of Chile) and Alexandre Bergel (University of Chile) and Michael Sedlmair (University of Stuttgart) and Daniel Weiskopf (University of Stuttgart)},

doi = {10.1145/3334480.3383017},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {We introduce AVAR, a prototypical implementation of an agile situated visualization (SV) toolkit targeting liveness, integration, and expressiveness. We report on results of an exploratory study with AVAR and seven expert users. In it, participants wore a Microsoft HoloLens device and used a Bluetooth keyboard to program a visualization script for a given dataset. To support our analysis, we (i) video recorded sessions, (ii) tracked users' interactions, and (iii) collected data of participants' impressions. Our prototype confirms that agile SV is feasible. That is, liveness boosted participants' engagement when programming an SV, and so, the sessions were highly interactive and participants were willing to spend much time using our toolkit (i.e., median ≥ 1.5 hours). Participants used our integrated toolkit to deal with data transformations, visual mappings, and view transformations without leaving the immersive environment. Finally, participants benefited from our expressive toolkit and employed multiple of the available features when programming an SV.",},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{ColleyTowardsADesignSpace,

title = {Towards a Design Space for External Communication of Autonomous Vehicles},

author = {Mark Colley (Ulm University) and Enrico Rukzio (Ulm University)},

url = {https://www.twitter.com/mi_uulm, Twitter},

doi = {10.1145/3334480.3382844},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {"Autonomous vehicles are about to enter the mass market

and with it a complex socio-technical system including

vulnerable road users such as pedestrians and cyclists.

Communication from autonomous vehicles to vulnerable

road users can ease the introduction of and aids in understanding

the intention of these. Various modalities

and messages to communicate have been proposed and

evaluated. However, a concise design space building on

work from communication theory is yet to be presented.

Therefore, we want to share our work on such a design

space consisting of 4 dimensions: Message Type, Modality,

Locus, and Communication Participants."},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DreyTowards,

title = {Towards Progress Assessment for Adaptive Hints in Educational Virtual Reality Games},

author = {Tobias Drey (Ulm University) and Pascal Jansen (Ulm University) and Fabian Fischbach (Ulm University) and Julian Frommel (University of Saskatchewan) and Enrico Rukzio (Ulm University)},

url = {https://youtu.be/3uW-NBEatTg, Video

https://www.twitter.com/mi_uulm, Twitter},

doi = {10.1145/3334480.3382789},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {One strength of educational games is their adaptivity to the individual learning progress. Methods to assess progress during gameplay are limited, especially in virtual reality (VR) settings, which show great potential for educational games because of their high immersion. We propose the concept of adaptive hints using progress assessment based on player behavior tracked through a VR-system's tracking capabilities. We implemented Social Engineer, a VR-based educational game teaching basic knowledge about social engineering (SE). In two user studies, we will evaluate the performance of the progress assessment and the effects of the intervention through adaptive hints on the players' experience and learning effects. This research can potentially benefit researchers and practitioners, who want to assess progress in educational games and leverage the real-time assessment for adaptive hint systems with the potential of improved player experience and learning outcomes.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{MaritschTowards,

title = {Towards Wearable-based Hypoglycemia Detection and Warning in Diabetes},

author = {Martin Maritsch (Eidgenössische Technische Hochschule Zurich) and Simon Föll (Karlsruhe Institute of Technology) and Vera Lehmann (Inselspital, Bern University Hospital) and Caterina Bérubé (Eidgenössische Technische Hochschule Zurich) and Mathias Kraus (Eidgenössische Technische Hochschule Zurich) and Stefan Feuerriegel (Eidgenössische Technische Hochschule Zurich) and Tobias Kowatsch (University of St.Gallen / Eidgenössische Technische Hochschule Zurich) and Thomas Züger (Inselspital, Bern University Hospital) and Christoph Stettler (Inselspital, Bern University Hospital) and Elgar Fleisch (Eidgenössische Technische Hochschule Zurich / University of St. Gallen) and Felix Wortmann (University of St. Gallen)},

doi = {10.1145/3334480.3382808},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{ColleyUnveiling,

title = {Unveiling the Lack of Scalability in Research on External Communication of Autonomous Vehicles},

author = {Mark Colley (Ulm University) and Marcel Walch (Ulm University) and Enrico Rukzio (Ulm University)},

url = {https://www.twitter.com/mi_uulm, Twitter},

doi = {10.1145/3334480.3382865},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {The traffic system is a complex network with numerous individuals (e.g., drivers, cyclists, and pedestrians) and vehicles involved. Road systems vary in various aspects such as the number of lanes, right of way, and configuration. With the emergence of autonomous vehicles, this system will change. Research has already addressed the missing communication possibilities when no human driver is needed. However, there is no common evaluation standard for the proposed external communication concept with respect to the complexity of the traffic system. We have therefore investigated the evaluation of these in Virtual Reality, in monitor-based, and in prototypical setups with special regard to scalability. We found that simulated traffic noise is a non-factor in current evaluations and that involving multiple people and multiple lanes with numerous vehicles is scarce.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{AsconeVirtual,

title = {Virtual Reality for Individuals with Occasional Paranoid Thoughts},

author = {Leonie Ascone (University Medical Center Hamburg-Eppendorf) and Karolin Ney (Universität Hamburg) and Fariba Mostajeran (Universität Hamburg) and Frank Steinicke (Universität Hamburg) and Steffen Moritz (University Medical Center Hamburg-Eppendorf) and Jürgen Gallinat (University Medical Center Hamburg-Eppendorf) and Simone Kühn (University Medical Center Hamburg-Eppendorf)},

doi = {10.1145/3334480.3382918},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Individuals with paranoia often experience a high level of self-criticism and negative emotions. Guided compassion-focused (CF) imagery has shown to be successful in reducing these negative emotions and paranoid thoughts. However, some individuals have difficulties with CF imagery. By enabling a sense of presence, immersive virtual environments can overcome these limitations and induce specific emotional responses to support the development of self-compassionate feelings. In our study, we compared an immersive CF (CF-VR) with a controlled VR condition in a student sample of N = 21 participants with slightly elevated symptoms of paranoia. A virtual mission on the moon was designed and implemented to induce self-compassionate feelings with the help of interacting with a space nebula that represented the power of compassion. Our results show that the CF-VR intervention was well accepted and effective in reducing state paranoid thoughts. Worry decreased significantly within the CF-VR group, while self-compassion increased. },

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{SchrapelWatch,

title = {Watch my Painting: The Back of the Hand as a Drawing Space for Smartwatches},

author = {Maximilian Schrapel (Leibniz University Hannover) and Florian Herzog (Leibniz University Hannover) and Steffen Ryll (Leibniz University Hannover) and Michael Rohs (Leibniz University Hannover)},

url = {https://youtu.be/39V9im4Bm5Q, Video},

doi = {10.1145/3334480.3383040},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {"Smartwatches can be used independently from smartphones, but input tasks like messaging are cumbersome due to the small display size. Parts of the display are hidden during interaction, which can lead to incorrect input. For simplicity, instead of general text input a small set of answer options are often provided, but these are limited and impersonal. In contrast, free-form drawings can answer messages in a very personal way, but are difficult to produce on small displays. 

To enable precise drawing input on smartwatches we present a magnetic stylus that is tracked on the back of the hand. In an evaluation of several algorithms we show that 3D position estimation with a 7.5x20mm magnet reaches a worst-case 6% relative position error on the back of the hand. Furthermore, the results of a user study are presented, which show that in the case of drawing applications the presented technique is faster and more precise than direct finger input."},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{NowakWhat,

title = {What does the Oscilloscope Say?: Comparing the Efficiency of In-Situ Visualisations during Circuit Analysis},

author = {Adam Nowak (LMU Munich) and Pascal Knierim (LMU Munich) and Andrzej Romanowski (LMU Munich) and Albrecht Schmidt (LMU Munich) and Thomas Kosch (LMU Munich)},

doi = {10.1145/3334480.3382890},

year  = {2020},

date = {2020-04-26},

booktitle = {Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI 2020},

publisher = {ACM},

abstract = {Traditional measuring devices separate probes from their data visualisation, requiring the operator to switch attention between their metering and result frequently. We explored the efficiency of four different visualisation modalities during a circuit analysis task that utilises the output of an oscilloscope. We argue that the spatial alignment of an oscilloscope's display and probe interferes with the cognitive processing of data visualisations, hence increasing the probability of errors and required time. We compared a fixed placed oscilloscope, in-situ projections, user positioned tablets, and head-mounted display while measuring completion times, subjective workload, number of errors, and personal preferences after each task. Results indicate that the oscilloscope produced the lowest completion time compared to other modalities. However, visualising data on a user positioned tablet or through in-situ projections} yielded lower subjective workload and a lower number of errors. We discuss how our work generalises for assistive systems that support practitioners during their training in circuit analysis.},

keywords = {Late Breaking Work},

pubstate = {published},

tppubtype = {inproceedings}

}